| 摘要 |
PURPOSE:To reduce the quantity of signal lines by conducting the notices of a speed designated value and a motor rotating speed with one control line by utilizing pulses. CONSTITUTION:A control signal line is used to notify the speed of a motor to a peak value limiting and pulse output circuit 200 and to designate a speed to a peak value detecting and pulse output circuit 300. The circuit 200 has a pulse output circuit 210 and a peak value limiter 220. A motor controller 400 controls the speed of a motor 100 according to a voltage input from a terminal A, and outputs a pulse synchronized with the rotating speed of the motor from a terminal B. The circuit 300 has a peak value detector 310 and a pulse output circuit 320. The circuit 320 generates a pulse on the control signal line according to the pulse output from the terminal B, and converts the pulse on the control signal line to a rotary pulse having a peak value of predetermined amplitude. |
